The Urban Dictionary defines badum tish as
"an onomatopeia for a drum technique normally accompanying the
conclusion of a cheesy joke or a comedy pratfall (where someone is made
to look like an idiot by their own devising - such as falling on a
banana skin they earlier discarded). It consists of two fast rimshots
and a splash cymbal - producing the sound "badum tish".

Firstly, get those pesky SMD ICs out of the way:

Rest of SMD next.

Just 2 transistors:
one BC847 NPN (marked by the "n") & one BC 857 PNP (identified on the PCB by the "p")